*{
	margin:0;
	padding:0;
}

body{
	min-height: 200px;
}

#logo, #user, #nav_top, #nav_right, #nav_bottom, #nav_left{
	position: fixed;
	-webkit-transition-duration: 400ms;
	-webkit-transition-timing-function: ease;
	-moz-transition-duration: 400ms;
	-moz-transition-timing-function: ease;
	-o-transition-duration: 400ms;
	-o-transition-timing-function: ease;
	z-index: 1;
}

#logo{
	top: 25px;
	left: 30px;
}

#user{
	background: url('../img/user.png') no-repeat top right;
	width: 40px;
	height:40px;
	top: 25px;
	right: 30px;
}

#nav_top{
	background: url('../img/up-arrow.png') no-repeat 0px 5px;
	width: 40px;
	height: 45px;
	top: -31px;
	left: 50%;
	margin-left: -20px;
}

#nav_top:hover{
	top: 0px;
}

#nav_right{
	background: url('../img/right-arrow.png') no-repeat 0px 0px;
	width: 45px;
	height: 40px;
	top: 50%;
	right: -31px;
	margin-top: -20px;
}

#nav_right:hover{
	right: 0px;
}

#nav_bottom{
	background: url('../img/down-arrow.png') no-repeat 0px 0px;
	width: 40px;
	height: 45px;
	bottom: -31px;
	left: 50%;
	margin-left: -20px;
}

#nav_bottom:hover{
	bottom: 0px;
}

#nav_left{
	background: url('../img/left-arrow.png') no-repeat 5px 0px;
	width: 45px;
	height: 40px;
	top: 50%;
	left: -31px;
	margin-top: -20px;
}

#nav_left:hover{
	left: 0px;
}

#content{
	vertical-align: middle;
	width: 80%;
	height: 80%;

    position: absolute;
    top:0;
    bottom: 0;
    left: 0;
    right: 0;

    margin: auto;
	overflow: auto;
	min-height: 200px;
}